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Infiltration Testing

In order to determine if your ground conditions are suitable for the discharge of surface water using soakaways, site specific infiltration tests will be required. The tests will measure the rate of water infiltration into the ground (the infiltration rate). We provide infiltration testing in accordance with the BRE 365 specification in order to determine if discharge of surface water to the ground is / is not feasible. From our on-site investigations, we can determine your sites infiltration rate, enabling the accurate design of soakaways / other infiltration device.

In order to satisfy planning authorities, it is required to prove if surface water discharge through infiltration is / is not feasible on your site.

Our tests are BRE365 approved.

In order to satisfy planning authorities, it is required for new developments to manage surface water that enters the site, ensuring the proposed development will not increase the risk of flooding elsewhere. Sustainable drainage systems (SuDS) are required in order to replicate the natural surface water discharge rate into the nearest watercourse. Different solutions can be advised depending upon the site characteristics.

Where ground conditions are suitable, planning authorities will demand the first form of surface water discharge is via infiltration, replicating natural surface water discharge conditions. According to the BRE365 guidance, soakaways should discharge from full to half-volume within 24 hours, and this is to ensure that the soakaway or other proposed infiltration device has enough capacity to deal with another storm event within that 24 hours.

Site plans, development plan, planning applications and correspondence related to this requirement. We are always happy to have a chat over the phone or via email if you do not have all of the above.